Assertion (A) : if BOD level of water in a reservoir is more than 5 ppm it is highly polluted. Reason(R) : High biological oxygen demand means high activity of bacteria in water (a) (i) (b) (ii) (c) (iii) (d) (iv)

Assertion (A) : if BOD level of water in a reservoir is more than 5 pp

1.	Assertion (A) : if BOD level of water in a reservoir is more than 5 ppm it is highly polluted. Reason(R) : High biological oxygen demand means high activity of bacteria in water (a) (i) (b) (ii) (c) (iii) (d) (iv)
Answer» Correct answer is (d) (iv)

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Assertion (A) : if BOD level of water in a reservoir is more than 5 ppm it is highly polluted. Reason(R) : High biological oxygen demand means high activity of bacteria in water (a) (i) (b) (ii) (c) (iii) (d) (iv)

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